Power shaker



5 sneets-sreet 1 ATTORNEY Oct, 12, 1948. G. w. CARLSON POWER SHAKER Filed Deo. 22, 1944 Oct. 12, 1948. G. w. cARLsoN POWER SHAKER 5 Sheets-Sheet 2 Filed Dec. 22, 1944 INVENTOR @401,1 w. 644244" BY VMM, 0M

ATTORNEY Oct. 12, 1948. G. w. CARLSON POWER SHAKER 3 Sheets-Sheet 3 Filed Dec. 22, 1944 INVENTOR @Aan-jt. WIM

ATTORNEY Patented Oct. 12, 1948 PT'ENT 1 FE'FIICE. 1 2.4.51:,199 .i "l

. Porres SHAeE. j George- W; Carlson; Bridgevlleyjla., assigner. taz

BurrellL'Ic'eehnicalIl Supply Qomnanmittshnrgh;

Ba., acorporatiohgof. F- ennsylvania-, l Y Application December 22, 18H; SerialNo. 5Lir9f; 33,1Vv

(ci. vii-4.a)

2' Claims.

1.; This inventionrelatesto.pcwelt shakers and it is among the objects thereof'to provide a shaker for general purposes having a working' shaft: to

which screens or other elements to be shaken,

are operatively connected,V said shaft and operating mechanism including a motor being enclosed=ina unitary housing'aofcompact andA durable `form.V

Itf isanother object of the-inventionto provide a shaker mechanism in which the ydegree of vibration' oroscillation is adjustable duringv the operation of=the device. y

Itis still a further object orf-"the invention to provide in conjunction with such adjusting means, means for indicating the degree of vibration of the shaker shaft.

These and other objects of the invention will become apparent from a consideration of the accompanying drawings constituting a part hereof, in which Fig. 1 is a top plan view of a shaker embodying the principles of this invention;

Fig. 2 a side elevational view partially cut away, and

Fig. 3 an end elevational view partially in section with a part of the housing removed.

With reference to the several figures of the drawings, the structure therein illustrated comprises a base I on which is mounted a housing 2 for journaling a shaker shaft 3 in bearings 4. Shaft 3 is subjected to oscillatory movement angularly about its axis by an arm 5 extending through a ldrill hole 6 in the shaft 3 in which it is secured by a set screw l.

An adjustable collar 8 is provided on the rocker arm 5 for a purpose to be hereinafter stated. Journaled in the housing 2 is a counter-shaft 9 having a sheave wheel I8 connected by a V-belt II to a pulley I2 mounted on shaft I3 of a motor I4 secured by bolts I5 to the base I of the housing. Mounted on the counter-shaft 9 is an eccentric I6 on which is mounted a connecting rod I'I having a bifurcated end I 8 for receiving a connecting link I9 which is pivoted to the connecting rod by pin 20 and is provided with a transverse opening 2I for receiving the rocker arm 5 on which it is slidably mounted, the collar 8 of the rocker arm being adjusted to'a position for limiting the position of the connecting link I9 to thereby limit the movement of the rocker arm 5. An adjustment arm consisting of a bell crank lever 22 is journaled on countershaft 9 and is engaged by a brake arm 23 having a split end 24 through which is passed an adjusting screw 25 by which the split end may be adjusted on` t'l'ie adj ustmentarm@ t`o= frictionailyr engagethe latter; thel brakelarm; 23 being-i maideoff woedt or-l other@ suitable material, andffis-:S'eeuredif' which2 isiprovidedwith anaindicatorzfthat;regis-ters.l

againsttmovement by af pin` ZSeXtendi'ng: through.: the housing 2 as shown in Fig. 2. u

Ai pin` 21.? connects` the: adjusting army 22 with the connecting" link If9 and* oneendi ofthefx adi--` justing arm 221`is-.provided with `arrarme whichf; is: provided with.l ai 'threadedi end 29: for. receiving; a1 knokr thatlfectendsi: outside of the; housing: and;

with. the-"calibratedf graduations: shownl omthe platet SmFigf.. 1i "Mov-ement;-offfthe. bellcrankt adjusting arm 22 moves the connecting link I9 on the rocker arm 5 to vary the degree of oscillatory motion of the shaker shaft 3, the zero position being determined by placing the indicator on the Zero end of the graduated scale 30, in which position the connecting link I9 is nearest the shaker shaft 3 and collar 8 is then moved to abut the connecting link end there fastened. Movement of arm 28 on the scale of the plate 38 will then lengthen the fulcrum point of arm 5 to decrease the shaking action.

The pin 21 is secured to the connecting link I9 and is freely disposed in a slot 22a of the adjusting arm 22 as shown in Fig. 2. The brake 23 on the adjusting arm eliminates vibration of the adjusting arm and rocker mechanism such as would result in chatter. The use of the friction brake eliminates the need for notches or stops and permits of liner increments of adjustment of the decrease of rocking of the rocker arm, which is desirable when the device is employed in chemical laboratories for agitating liquids.

The operation of the above-described mechanism is briefly as follows. The motor I4 is energized by a switch I4a, Fig. 2, to rotate sheave wheel I0 which operates counter-shaft 9. The eccentric I6 actuates the connecting'rod I1 which causes the connecting link I9 to subject the rocker arm 5 to oscillatory movement Which, in turn, rocks the shaker shaft 3. By adjusting the arm 28 of the bell crank lever I'I, any predetermined degree of oscillatory movement may be obtained, such adjustment being made during the operation of the machine.

The above-described shaker mechanism is primarily intended for laboratory use as, for example, to shake bottles or vessels containing obviously have other applications for use in indus'try where a durable and simplied'form of shaker mechanism is needed.

Although one embodiment of the invention has been herein illustrated and described, it will be evident to those skilled in the art that various modifications may be made in the details of construction-Without departing from the principlesherein set forthf I claim:

1. In a shaker mechanism, a shaker shaft, a'

counter-shaft, drive mechanism for the latter, a

brake to hold said adjustement arm Vin any given position.

2. In a shaker mechanisma base and housing to constitute the same a self-contained unit, a shaker shaft journaled in said housing, a counter-shaft journaled in said housing, aV motor mounted on the base of the housing, a sheave vwheel mounted on the counter-shaft and a. sheave Wheel on the motor shaft having a V-belt connection therebetween, an eccentric on said counter-shaft having a connecting rod mounted to be actuated thereby, said connecting rod having a bifurcated end for receiving a connecting link pivotally mounted therein, said shaker shaft having a rocker arm disposed through an opening in said connecting link and an adjusting arm com-` prising a bell crank lever, an armof which i-s provided with a bifurcated-end for receiving a projection on said connecting link to adjust the position of -said link relative to said rocker arm, and H .the other armY of said bell crank lever extend-V ing toa slotted opening in the housing in align- Y ment with visible graduations to indicate the degree of adjustment effected by said arm, said adjusting arm being provided with friction means to maintain said arm in adjusted position, andA said rocker arm having an adjustable stop to determine 'the zero position of said adjusting arm. Y GEORGE lW. CARLSON.

REFERENCES cl'iEDv The following references vare of record in theY file of this patent: i

' UNITED STATES PATENTS l DateVV Number Name I K 677,316 Lehrritter June 2,5, 190,1 907,736 Card Dec. 29, 1908 1,975,489 Van Brunt ---.71 Oct. k2, 1934V 2,019,582 Racklyeft 1 1 Nov. 5, 1935,. 2,046,901 Kirby r July-7,1936

vShu 1 M-ar. 21, 1939 

